[gcr]

I saw this last year! You can replicate this system with a stack of index cards and a hair tie. :)

You can even make the top card stand at a similar angle if you want: take the top card off the stack, bend the edge inward by 120 degrees or so, and tuck that "hook" of the bent card back into the hair tie to stand it upright. You can even put a pen in there. It's great to take to the store for shopping!

[egypturnash]

A binder clip works well too. It's the Hipster PDA! http://www.43folders.com/2004/09/03/introducing-the-hipster-...

[Arubis]

This was also my first thought! Everything old is new again.

[allenu]

I immediately thought of the Hipster PDA as well. I'm so glad the page is still up after all these years!

[protomyth]

I thought of this: https://www.levenger.com/stationery-notebooks-322/pocket-bri...

Because you might as well go in style.

[wsinks]

Thank you for doing the design work for me! I'm literally copying the well thought drawn in system.

I was just wondering how I would make the wood thing, and now you've inspired me to have this system on my desk by the end of the day. Brilliant!

[spicybright]

Yup! You can also buy a flash card holder, which is a plastic case that's index card sized if you're so inclined.